Electrode.



PATENTED NOV. 12 1907.

N I A m L U A QM m T G E &L E S B U G A "I 0 7 8 m N APPLICATION FILED APR. 26. 1905.

@nveufova Q/Vi means 1 ammg UNITED sra'r as rarnn'r OFFICE.

GEORGE A. GUESS, OF SILVERTON, COLORADO, AND HERBERT E. T. HAULTAIN, OF NELSON,

' BRITISH COLUMBIA, CANADA.

ELECTRODE I No. 870,675.

Specification of Letters Patent.

Patented Nov. 12, 1807.

Application filed April 26.1905. Serial in. 257,541.

To all whom it may concern:

Be it known that we, Gsoaon A. Gunss, a subject of the-King of Great Britain, residing at Silverton, in the county of San Juan and State of Colorado, and

l H'Eunua'r E. T. HAULTAIN, a subject of the King of Great liritain, residing at Nelson, in the county of Kootenay, British Columbia, Canada, have invented a certain new and useful Improvement in Electrodes, of which the following is a full, clear, and exact description.

The object of this invention is to provide light weight and relatively cheap electrodes, specially adapted for electro-chemical analysis. it is common to make electrodes for such purposes of platinum, and in the form of coils, rings, disks and the like, and to provide them with round shanks for insertion in the ordinary screw-post terminals or binding posts. These are relatively heavy and expensive, and are subject to abrasion and wear in the terminals.

Our invention is designed to provide light, cheap and efficient electrodes, adapted for frictional engagement with the binding posts or terminals.

The invention consists of an electrode of thin, sheet platinum, having a blade corrugated lengthwise to render it rigid, and a tang or shankadapted to be frictionally engaged in a slitted terminal or binding-post, so;calle(.l, all as hereinafter set forth and claimed.

In the accompanying drawings illustrating the invention, in. the several figures of which like parts are sirnilarlyxlesignatcd, Figure 1 is an elevation of one of the electrodes, on which the deposit is made. Fig. 2 is an elevation of the other electrode. Fig. 3 is an end view of Fig. i. Fig. 4 is an end view of Fig. 2. Fig. 5 is a perspective view of the terminal or binding-post so-called. Fig. 6 is a diagram illustrating a preferred arrangement of the electrodes.

In all of these views the parts are exaggerated.

The electrodes 1 and 2 are the same in construction and differ only in width. Each is made of sheet platinum, about one-thousandth of an inch thick, with a relatively wide blade portion 3, and 4, and a tang or shank 5 and 6. The blades are corrugated or crimped longitudinally, as shown in detail Figs. 3 and 4, in order to stiffen them.

The terminals or binding-posts, 7, Fig. 5, instead of having a set-screw as usual to fasten in. the electrodes,

are made of solid metal, preferably aluminium, and

' provided with longitudinal slits 8 which engage the tangs frictionally to support the electrodes.

In using these electrodes, they are arranged, as shown in the diagram Fig. 6, in sets of three, one with a broad blade, and connected through its terminal with one pole of the source of electric current, and one with a narrow blade arranged equidistantlyon each side of l the broad blade electrode; and these two narrow blade electrodes are connected together, through their supporting terminals, with the other pole of the source of electric current.

It is to be understood that in the use of these electrodes, only the blades are immersed in the electrolytc or fluid.

With three electrodes placed equidistant, a uniform deposit is obtained on the middle or broad blade. This, with heavy deposits, tends to lessen the tendency to peel off, and consequently permits the use of a smaller area to, hold the same quantityof deposit. The three electrodes weigh only about two and fivetenths grams, and cost approximately one dollar and eighty cents, as against eighteen grams weight and tif teen dollars cost of the common constructions. By reason of this decreased weight, more accurate weighing of the deposit is possible, and tluu'cforo greater. ac

curacy in determinations.

The rigidity afforded by corrugating or crimping the blades, admits of the use of very thin sheets of platinum.

Inserting the electrodes in slits in the terminals avoids the abradiug incident to the use of set-screws, and renders the connecting up and removal of the electrodes more expeditious, and further gives better contact, especially where exposed to acid 'fumes' Acid fumes do not attack the aluminium terminals and they therefore remain bright and the contact is unimpaired.

While platinum is the preferred metal for our electrodes, the invention, is not limited to its use, and while we prefer to use these electrodes in sets of three and with slit and aluminium terminals, we do not thus limit our invention. We may extend the central corrugation of the electrode '1 through the tang, if desired, and further, it is not necessary tomake the blades of the electrodes 2 wider than the tangs, since good results may'be had by the use of a straight piece of metal of equal width throughout and having only one corrugation. 4

What we claim is:-

The herein-'descrlbed electrode for electrochemical analysis, having the blade and the central straight tang, constructed integrally of thin sheet metal and corrugated or ('rimpcd longltudlnaliy, and adapted to he engaged frietlonully with a terminal and without the intervention of a binding-screw, hooks or other usual devices.

In testimony whereof we have hereunto set our hands this 20th day of April A. D. 1905.

GEO. A. GUESS. HERBERT E. T. HAULTAIN.

Witnesses WILLIAM N. SEARCY, WM. A. \VAY. 

